YH5WZ-51/134 Station-Free Surge Arrester

The YH5WZ-51/134 Station-Free Surge Arrester is a next-generation lightning protection device built for 10kV–220kV transmission and substation networks. Unlike traditional arresters, this model eliminates the base structure — a station-free installation design — allowing direct mounting on transmission poles or towers. This innovation simplifies installation, reduces project costs, and minimizes labor input.

At its core, the arrester combines high-performance Zinc Oxide (ZnO) varistors and a composite silicone rubber housing, providing exceptional insulation, durability, and mechanical strength. Tested to discharge 10kA, 8/20μs lightning overvoltage impulses, it effectively lowers lightning trip rates by over 65%, safeguarding critical grid infrastructure.

The product meets GB 11032-2000 (equivalent to IEC 60099-4) and JB/T 10497-2005 standards, ensuring top-level compliance and safety in all applications.

Core Design and Performance

1. Structural Innovation

• Base-Free Direct Mounting:
  The YH5WZ-51/134 requires no external foundation or base plate. It can be directly mounted on crossarms or tower frames, simplifying installation steps, minimizing civil works, and reducing installation time by up to 40%.

• High-Quality Materials:
  Built with premium ZnO varistors as the conductive core and a high-strength silicone rubber sheath for external insulation, the arrester ensures superior weather resistance and mechanical endurance even in corrosive or high-UV environments.

• Lightweight Advantage:
  Up to 30% lighter than traditional designs, the arrester is ideal for high-altitude or difficult-access installations, reducing tower load and enabling safer handling.

2. Lightning and Overvoltage Protection

• High Discharge Capacity:
  Capable of safely discharging 10kA (8/20μs) lightning surges, protecting substations, transmission lines, and power transformers from transient overvoltages.

• Reduced Trip Rate:
  Proven to cut lightning trip rates by 65%+, ensuring system stability and fewer outages.

• Extended Lifespan:
  Designed for 30 years of operational reliability, with zero routine maintenance required.

3. Environmental and Durability Features

• Extreme Temperature Resistance: Operates efficiently from -40°C to +70°C.

• Salt Fog & UV Protection: Suitable for coastal and high-irradiance regions, resisting corrosion and aging.

• Pollution Resistance: Rated for Class IV pollution, the highest level per IEC standards — ideal for industrial and metallurgical zones.

• Mechanical Strength: Excellent wind and vibration resistance, making it ideal for mountainous areas and wind farms.

Compliance and Standards

The YH5WZ-51/134 arrester is manufactured in strict accordance with internationally recognized standards to guarantee safety, reliability, and global interoperability:

Environmental Adaptability

Application Scenarios

1. Direct Tower Installation

Perfect for direct suspension on transmission towers or crossarms. This setup minimizes material use, supports retrofits of old lines, and reduces installation time in new transmission projects.

2. Industrial Pollution Zones

With its extended creepage distance and Class IV pollution resistance, the YH5WZ-51/134 performs reliably in chemical plants, metallurgical areas, and heavy industrial zones, preventing flashover or insulation degradation.

3. Mountain and Wind Farm Applications

Its lightweight design and superior wind/vibration resistance make it suitable for mountainous areas and wind farms, where high winds and dynamic loads are common.

Key Advantages

• Simplified installation — No base required

• 30% lighter than conventional arresters

• Reduces lightning trip rates by 65%+

• Zero maintenance, with a 30-year lifespan

• Excellent resistance to UV, salt fog, and pollution

• Complies with GB and IEC international standards

FAQ – Common Questions About YH5WZ-51/134

• What is the purpose of the “base-free” design?
It eliminates the need for additional civil works or foundation installation, saving time and cost. Ideal for retrofits or limited-space projects on transmission towers.

• How does this arrester handle extreme weather?
With a -40°C to +70°C operating range, UV resistance, and salt-fog protection, it performs reliably in coastal, desert, or high-altitude environments.

• Can it withstand industrial pollution?
Yes. Rated Class IV, it is specifically built for chemical, metallurgical, and heavy industrial areas with severe contamination.

• How effective is it at reducing power outages?
Field tests confirm it reduces lightning trip rates by more than 65%, significantly improving grid reliability.

• What maintenance does it require?
The arrester is completely maintenance-free due to its sealed silicone rubber body and moisture-resistant ZnO core.

Conclusion

The YH5WZ-51/134 Station-Free Zinc Oxide Surge Arrester represents the future of cost-efficient, durable, and high-performance lightning protection for modern power systems. Its lightweight, base-free structure simplifies installation, while advanced ZnO varistor technology ensures long-term system safety even under extreme environmental stress.

If you’re planning upgrades for substations, transmission lines, or wind energy projects, the YH5WZ-51/134 is the ideal choice for maximizing protection and minimizing lifecycle cost.

Contact Engineer Thor at Wei Shoe Elec for a customized solution:
📞 Tel: 86-0577-62788197
💬 WhatsApp: +86 159 5777 0984
📧 Email: [email protected]